Ranking Score Explained

Hi there, thanks for your interest in how we calculate an experience's ranking score. It's at the core of Rankers so I'm pleased you're curious.

The ranking score percentage is used to compare and sort experiences in ranking tables. It is not necessarily a direct measurement of the quality of a particular experience as rated by its customers. I've found it a useful tool to allow me to find the best experiences with confidence. But I've also found it important to read the customer reviews before making any final judgements!

We calculate an experience's ranking score using a multi-factor data model instead of a raw data average (mean). This model takes into account several important questions. For instance - is there a trusted body of reviews? What is the age of a review and is the review from a credible source?

Below you'll find details around some of the important factors that went into calculating the ranking score for Waitomo Glowworm Caves.

If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz. We don't believe this is perfect or complete so we're always interested in ways we might make improvements.

Nick Morrison's avatar

Nick Morrison

Rankers owner

Waitomo Glowworm Caves

Valid Reviews

288 Valid Reviews

The Waitomo Glowworm Caves experience has a total of 289 reviews. There are 288 valid reviews that are included when calculating the ranking score and 1 invalid review that are excluded from the calculation. Reviews can be excluded only when a reviewer is not verified or after an investigation by our team determines the reviewer is not genuine.

Below is the distribution of ratings for the 288 valid reviews:

Rating Count Percentage
10/10 36
13%
9/10 52
18%
8/10 81
28%
7/10 64
22%
6/10 22
8%
5/10 13
5%
4/10 8
3%
3/10 5
2%
2/10 4
1%
1/10 3
1%

75.66% Average

The raw data average (mean) for all the Waitomo Glowworm Caves valid reviews is 75.66% and is based on 288 valid reviews. This value is not used to calculate the ranking score and it only provided here as a comparison to the weighted average.

Face-to-Face Reviews

263 Face-to-Face Reviews

The Rankers team meets with travellers while they’re in New Zealand and conducts face-to-face surveys. These reviews, in our opinion, are the most trusted in the industry and represent a critical control sample. To our knowledge, we are the only travel review website in the world that has gone to this extent.

More about face-to-face reviews

Within the 288 valid reviews, the experience has 263 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 263 face-to-face reviews:

Rating Count Percentage
10/10 29
11%
9/10 49
19%
8/10 76
29%
7/10 57
22%
6/10 21
8%
5/10 13
5%
4/10 7
3%
3/10 5
2%
2/10 4
2%
1/10 2
1%

75.36% Average

The raw data average (mean) for all the Waitomo Glowworm Caves face-to-face reviews is 75.36% and is based on 263 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

74.64%

Rankers calculates a weighted mean as a base average on which we can improve. Individual review's ratings are given a weight based on several factors. The weight of a review determines the overall impact it'll have on the final weighted average.

Recent reviews have more weight as they are more relevant and reflect the experience as it currently operates. Over time reviews become less relevant and loose their impact on the ranking score.

Low rating reviews carry slightly less weight. This dampens the effect of very low ratings for every experience across the board. This is especially important when the experience has few reviews overall and a single negative rating can grossly mischaracterise an experience. Consistent poor reviews will still result in the experience receiving a comparitively low ranking score.

Credible sources provide reviews that can be trusted. If we have verified a reviewer is genuine via a face-to-face meeting then the review carries additional weight.

Reviewer Rating Age Face-to-Face Weight Relative Weight
ros fraser 4/10 829 days 12.81 100%
wynden 1/10 857 days 10.2 80%
Rado Hank 10/10 944 days true 8.61 67%
Lizzie Edmonds 8/10 945 days true 8.14 64%
Anis Quentin 7/10 952 days true 7.5 59%
Jeny Smolders 7/10 956 days true 7.34 57%
Oscar Petersen 8/10 963 days true 7.37 58%
Ani 9/10 1071 days 5.09 40%
Martin Murlik 8/10 1184 days true 4.58 36%
Laura 9/10 1195 days true 4.8 38%
Melanie Farrell 7/10 1203 days true 4.36 34%
Andy 10/10 1210 days true 4.77 37%
Julia Achatz 5/10 1224 days true 3.85 30%
Auba Mateos 7/10 1230 days true 4.31 34%
Charlotte 7/10 1230 days 4.31 34%
Isabel Zedelius 8/10 1233 days true 4.49 35%
Dries 8/10 1273 days true 4.42 35%
Clarissa Glaser 8/10 1274 days true 4.42 34%
Alna 10/10 1279 days true 4.64 36%
Holger Worner 9/10 1279 days true 4.64 36%
Karlee Hormell 9/10 1288 days true 4.62 36%
Alonso 9/10 1292 days true 4.61 36%
Rose Guillaume 8/10 1295 days true 4.38 34%
Caroline Coudray 8/10 1299 days true 4.37 34%
Barbara 8/10 1299 days true 4.37 34%
Leonie Brabers 7/10 1307 days true 4.17 33%
Bina Johansson 10/10 1307 days true 4.59 36%
Sam Staines 9/10 1311 days true 4.58 36%
Erik 6/10 1314 days true 3.79 30%
Nicole Signer 8/10 1321 days true 4.33 34%
Sam Taylor 7/10 1325 days true 4.14 32%
Vanuxem 8/10 1529 days true 3.94 31%
Clara Bertomeu 10/10 1529 days 4.15 32%
Lukas Boller 9/10 1531 days true 4.15 32%
Mette Elholm 7/10 1545 days true 3.75 29%
Mathilde Arp 8/10 1545 days true 3.91 31%
Chloe and Guillame 9/10 1549 days true 4.11 32%
Andre 9/10 1551 days true 4.11 32%
Doerte 10/10 1551 days true 4.11 32%
Saskia Peek 9/10 1552 days true 4.11 32%
Erika Tarant 8/10 1552 days true 3.9 30%
Jennifer Nguyen 7/10 1553 days true 3.73 29%
Julie Duvert 7/10 1553 days true 3.73 29%
Dan Ramsl 4/10 1553 days true 3.24 25%
Lucy Mulvin 7/10 1554 days true 3.73 29%
Fine Kochling 9/10 1556 days true 4.1 32%
Eberhard 9/10 1556 days true 4.1 32%
Hannes 8/10 1557 days true 3.89 30%
Calum Penn 9/10 1559 days true 4.09 32%
Arthur Portolleau 6/10 1560 days true 3.39 27%
Elisabet 10/10 1561 days true 4.09 32%
Tommy Mannien 8/10 1562 days true 3.88 30%
Solange Bourbeois 8/10 1565 days true 3.88 30%
Talissa Missiato 10/10 1565 days true 4.08 32%
Severin Knegsch 9/10 1566 days true 4.08 32%
Pierre Jouffineau 10/10 1567 days true 4.08 32%
Lewis Whittle 8/10 1569 days true 3.87 30%
Ben and Pauline 8/10 1571 days true 3.87 30%
Ann-Kathrin 7/10 1576 days true 3.69 29%
Natasha Harbinson 10/10 1577 days true 4.06 32%
Sebastian 2/10 1578 days true 3.04 24%
Jaquein Bucholz 3/10 1578 days true 3.12 24%
Chiara 7/10 1578 days true 3.69 29%
Cariotta Kemper 3/10 1578 days true 3.12 24%
Megan Lenox 7/10 1581 days true 3.68 29%
Max Mustermann 8/10 1583 days true 3.84 30%
Amy Stafford 8/10 1586 days true 3.84 30%
Carl 7/10 1586 days true 3.68 29%
Briony 7/10 1588 days true 3.67 29%
Melanie Kronbichler 8/10 1589 days true 3.83 30%
Andreas Schiefer 7/10 1590 days true 3.67 29%
Veronique Kaplan 3/10 1592 days true 3.1 24%
Robin Ings 6/10 1593 days true 3.34 26%
Stula Vladimir 7/10 1594 days true 3.66 29%
David Soukal 8/10 1594 days true 3.82 30%
Olivia Aliprandi 7/10 1595 days true 3.66 29%
Isabelle 2/10 1597 days true 3.01 24%
Jonathan Gourmel 8/10 1597 days true 3.82 30%
Mikkel Palleson 4/10 1600 days true 3.17 25%
Franziska and Sabine 7/10 1601 days true 3.65 28%
Chloe Guerillot 7/10 1601 days true 3.65 28%
Faye Oliver 7/10 1603 days true 3.65 28%
Iris Kerbler 9/10 1603 days true 4.01 31%
Til Schaebitz 6/10 1604 days true 3.32 26%
Elisabeth Grabner 9/10 1606 days true 4.0 31%
Berith 10/10 1606 days true 4.0 31%
Chris Simpson 6/10 1609 days true 3.32 26%
Pekka and Jonna 9/10 1609 days true 3.99 31%
Jonas Hoerning 8/10 1610 days true 3.79 30%
Nils 10/10 1610 days true 3.99 31%
Mark Rosema 8/10 1611 days true 3.79 30%
Lisa Huber 10/10 1611 days true 3.99 31%
Nicola Wiggan 9/10 1632 days true 3.95 31%
Linda and Gunther 4/10 1633 days true 3.12 24%
Julie 9/10 1634 days true 3.95 31%
Maria Schaer 7/10 1638 days 3.58 28%
Mette and Jesper 5/10 1640 days true 3.19 25%
Pierre and Alexandra 6/10 1646 days true 3.26 25%
Julia Waenninger 8/10 1658 days 3.7 29%
Sarah Boettcher 9/10 1694 days true 3.83 30%
Suzanne Vermeulen 6/10 1711 days 3.15 25%
Blandine Giusti 7/10 1914 days true 3.09 24%
Bart Hanssen 6/10 1993 days true 2.69 21%
Astrid Egesten 7/10 2044 days 2.86 22%
Jean Curry 9/10 2268 days true 2.7 21%
Carla Oyarzun 1/10 2272 days true 1.97 15%
Philippe Chiasson 9/10 2278 days true 2.68 21%
Helma Druyken 4/10 2288 days true 2.11 16%
Florian Guttler 7/10 2291 days true 2.42 19%
Casandra Prunica 8/10 2292 days true 2.52 20%
Lauren Hedley 7/10 2292 days true 2.42 19%
Janina Zwerver 8/10 2292 days true 2.52 20%
Marieke Feyteres 4/10 2296 days true 2.09 16%
van Linda Werner 5/10 2296 days true 2.15 17%
Philip Donachie 7/10 2306 days true 2.39 19%
Luisa Bach 8/10 2306 days true 2.5 20%
Kristina 7/10 2308 days true 2.39 19%
Eugen Lehner 6/10 2309 days true 2.18 17%
Manuel Bach 7/10 2309 days true 2.39 19%
Matthias Freiling 2/10 2316 days true 1.96 15%
Debora Grusler 6/10 2319 days true 2.16 17%
Andreas Brodhaeker 8/10 2332 days true 2.45 19%
Renee van der Syde 7/10 2333 days true 2.35 18%
Martha Horst 8/10 2333 days true 2.45 19%
Roland Beer 7/10 2337 days true 2.34 18%
Johanna Bak 4/10 2337 days true 2.03 16%
Lior Bakski 9/10 2347 days true 2.55 20%
Bet 9/10 2348 days true 2.55 20%
Memain 8/10 2621 days true 1.91 15%
Konza 7/10 2622 days true 1.83 14%
Steen Rausmussen 8/10 2653 days true 1.85 14%
David Restell 10/10 2683 days 1.89 15%
Christina Rodewald 9/10 2688 days true 1.88 15%
Hanneke P 7/10 2714 days 1.67 13%
Kohler 9/10 2734 days true 1.79 14%
Alexandra van den Brack 6/10 2742 days true 1.47 12%
Paul Lawrence 9/10 2743 days true 1.77 14%
Abby Rushmer 7/10 2744 days true 1.61 13%
Stephan Olivier 7/10 2749 days true 1.6 13%
Stephan Olivier 7/10 2749 days true 1.6 13%
Faassen 8/10 2753 days true 1.67 13%
Julie Lamart 8/10 2754 days true 1.67 13%
Adrian Weidell 5/10 2950 days true 1.11 9%
Jonathan Tuthill 9/10 3005 days true 1.26 10%
A Ormsby 10/10 3017 days true 1.24 10%
Gillian Rowe 10/10 3030 days true 1.21 9%
Ryan Pynappels 8/10 3031 days true 1.15 9%
Peter Dellen 8/10 3032 days true 1.15 9%
Jorg Steffens 8/10 3032 days true 1.15 9%
Danielle & Jobbe 9/10 3034 days true 1.21 9%
Christina 6/10 3035 days true 1.0 8%
Jop Veldhuis 7/10 3035 days true 1.1 9%
Paul Weidenfeld 8/10 3036 days true 1.14 9%
Sophie Dorrepaal 7/10 3036 days true 1.09 9%
Fannette Peyreplane 5/10 3037 days true 0.97 8%
Norm Cooper 7/10 3041 days true 1.08 8%
Gloria, Rose & An 8/10 3041 days true 1.13 9%
A Sorg 10/10 3041 days true 1.19 9%
Samplonius 5/10 3044 days true 0.96 8%
Petra 10/10 3044 days true 1.19 9%
Bethany Hamilton 8/10 3048 days true 1.12 9%
suffolkhouse69 9/10 3049 days 1.18 9%
a a 8/10 3080 days 1.06 8%
Julia Balionis 7/10 3094 days true 0.99 8%
Julia Hartman 3/10 3095 days true 0.84 7%
Fabienne Indergand 7/10 3115 days true 0.95 7%
Waldemar Schuler 9/10 3127 days true 1.02 8%
pepette31 7/10 3202 days 0.8 6%
Craig Hathaway 9/10 3354 days true 0.58 5%
Stephane Lebel 9/10 3359 days true 0.57 4%
Rens Hemselmans 7/10 3372 days true 0.5 4%
Isabell 10/10 3374 days true 0.54 4%
Holly Cave 5/10 3374 days true 0.44 3%
J Palmer 6/10 3378 days true 0.44 3%
Liz & Jim 10/10 3380 days true 0.53 4%
Edgar & Marilyn Berry 9/10 3382 days true 0.52 4%
Simon Vickers 2/10 3385 days true 0.39 3%
Leslie 8/10 3398 days true 0.47 4%
Jean-Francois Guilbault 8/10 3399 days true 0.47 4%
Selina Mueller 7/10 3400 days true 0.45 3%
Tamlin Barton 3/10 3401 days true 0.38 3%
Cara Dungay 8/10 3402 days true 0.46 4%
Bottcher 10/10 3402 days true 0.49 4%
Alexandra 10/10 3403 days true 0.48 4%
Philipp Rau 7/10 3405 days true 0.44 3%
Dan Aldridge 9/10 3407 days true 0.48 4%
John Allen 8/10 3409 days true 0.45 3%
Curtis Penner 8/10 3409 days true 0.45 3%
Brandt 8/10 3411 days true 0.44 3%
Nadia Husain 5/10 3414 days true 0.37 3%
T J Andrews 6/10 3430 days true 0.36 3%
Charli Skinner 7/10 3681 days true 0.0 0%
Carl_Larsen 10/10 3690 days 0.0 0%
Susan & Richard 10/10 3751 days 0.0 0%
Rik 9/10 3752 days true 0.0 0%
Jonathan Martin 7/10 3754 days true 0.0 0%
Gunda G 9/10 3759 days true 0.0 0%
Aaron 8/10 3761 days true 0.0 0%
Will Jemma 6/10 3764 days true 0.0 0%
Christen Hans 10/10 3765 days true 0.0 0%
Monica and Danie. 7/10 3773 days true 0.0 0%
Stephen 5/10 3775 days true 0.0 0%
Susan 10/10 3775 days true 0.0 0%
snodge 8/10 3779 days 0.0 0%
Bo Moenstead 9/10 3788 days true 0.0 0%
Alain Deslandres 8/10 3792 days true 0.0 0%
Jakob Jurgen 10/10 3793 days true 0.0 0%
EA Anders 8/10 3796 days true 0.0 0%
Helen and Hans Walser 1/10 3799 days true 0.0 0%
kevinp 8/10 3822 days true 0.0 0%
warrenp 9/10 3826 days true 0.0 0%
braunweiler 9/10 3830 days true 0.0 0%
pimn 9/10 3835 days true 0.0 0%
asiacritics 7/10 3841 days 0.0 0%
Chris Mackamul 8/10 3848 days true 0.0 0%
Debbie Rathbone 10/10 3848 days true 0.0 0%
Lisette X 9/10 3849 days true 0.0 0%
Martin 10/10 3851 days true 0.0 0%
Thomas Willi 10/10 3851 days true 0.0 0%
Elodie 7/10 3852 days true 0.0 0%
richardh 7/10 3966 days true 0.0 0%
trvlbug 8/10 3994 days 0.0 0%
glennandjen 10/10 4055 days 0.0 0%
BryonyS 9/10 4073 days true 0.0 0%
Marion 9/10 4089 days true 0.0 0%
Mikey 7/10 4090 days true 0.0 0%
Richard Komzik 6/10 4091 days true 0.0 0%
Michael Walsall 10/10 4094 days 0.0 0%
Anna 8/10 4109 days true 0.0 0%
Abigail 7/10 4109 days true 0.0 0%
lannie 7/10 4118 days true 0.0 0%
SimonR 8/10 4119 days true 0.0 0%
SonjaG 7/10 4119 days true 0.0 0%
Chris 8/10 4125 days true 0.0 0%
AurelieD 8/10 4132 days true 0.0 0%
Yunker 10/10 4133 days true 0.0 0%
Andrew 8/10 4135 days true 0.0 0%
Erin 9/10 4135 days true 0.0 0%
Christopher Gallaga 8/10 4141 days 0.0 0%
Amy 10/10 4147 days true 0.0 0%
Shona 8/10 4147 days true 0.0 0%
plumbaum 9/10 4149 days true 0.0 0%
Sandra 10/10 4157 days true 0.0 0%
Evangelista 8/10 4157 days true 0.0 0%
Oliver 5/10 4159 days true 0.0 0%
Kat 9/10 4189 days true 0.0 0%
Lisa 8/10 4216 days true 0.0 0%
siobhan 8/10 4218 days true 0.0 0%
Alice 8/10 4218 days true 0.0 0%
NORTZ 7/10 4246 days 0.0 0%
Stefan 8/10 4248 days true 0.0 0%
Hugh Trenchard 9/10 4265 days 0.0 0%
Niamh 4/10 4271 days true 0.0 0%
Jenny 9/10 4295 days true 0.0 0%
Louise 8/10 4304 days true 0.0 0%
Peddy 10/10 4314 days 0.0 0%
Katie Wise 8/10 4317 days true 0.0 0%
Thomas Bachmann 8/10 4333 days true 0.0 0%
Daniala 8/10 4352 days true 0.0 0%
Tom Ben 9/10 4456 days true 0.0 0%
Sarah Maudsley 8/10 4471 days true 0.0 0%
Alan Bellerby 8/10 4471 days true 0.0 0%
Tina Daly 5/10 4477 days true 0.0 0%
John Woodrow 8/10 4486 days true 0.0 0%
Ernst Seter 9/10 4486 days true 0.0 0%
Jim Curley 7/10 4497 days true 0.0 0%
Daniel 7/10 4498 days true 0.0 0%
Marc Hertogs 7/10 4501 days true 0.0 0%
Laura Sutton 5/10 4525 days true 0.0 0%
Jeroen 5/10 4527 days true 0.0 0%
Mum! 6/10 4527 days true 0.0 0%
Gail 9/10 4531 days true 0.0 0%
Heike Julia 6/10 4532 days true 0.0 0%
Lanni 8/10 4532 days true 0.0 0%
Amanda Finger 7/10 4533 days true 0.0 0%
Desiree Muri 7/10 4533 days true 0.0 0%
Jan Grzejik 8/10 4560 days true 0.0 0%
Wouter Ewalts 8/10 4567 days true 0.0 0%
Matilde 6/10 4575 days true 0.0 0%
Kim 6/10 4772 days true 0.0 0%
Gillian 8/10 4814 days true 0.0 0%
Denise Nick 6/10 4824 days true 0.0 0%
ranker_110 8/10 4843 days true 0.0 0%
Jasper 7/10 4850 days true 0.0 0%
Mary 8/10 4850 days true 0.0 0%
Lucy 6/10 4850 days true 0.0 0%
Lukas 8/10 4861 days true 0.0 0%
Hanna 7/10 4863 days true 0.0 0%

Adjustments

Several adjustments to the weighted average are added to improve relevancy and credibility. These adjustments apply equally to all experiences that meet the criteria.

Sample Size Adjustment

No Adjustment

A reasonable number of reviews are necessary in order for the average to be credible and for an experience to take a prime position within the ranking tables. As such, experiences with only a few reviews have a moderated score. This does not mean that the experience or the reviews can't be trusted. The Waitomo Glowworm Caves experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-2.33% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 111 days. However the Waitomo Glowworm Caves experience does not meet the criteria for any adjustment.

In addition, an experience's ranking score may be adjusted for each day there is no new ranking. After 1 day the adjustment comes into effect. The maximum number of days that can be adjusted for is 200 days. Due to the seasonal nature of many businesses, this adjustment is applied dynamically throughout the year.

The Waitomo Glowworm Caves experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -2.29%
198 -2.30%
199 -2.32%
200 -2.33%
201 -2.34%
202 -2.35%
203 -2.36%

Final Ranking Score

72%

The final ranking score once adjustments and rounding has been applied. This value is cached and recalculated each day. Therefore it may not be precisely accurate based on the other values presented.

If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz.